针对我区冬油菜苗期死亡严重,翻耕报废面积大,产量低而不稳的问题,对大面积的油菜地块进行了调查,进一步证实了油菜死苗的主要原因是油菜根蛆的危害。油菜根蛆是油菜根蝇的幼虫。油菜根蝇又名白菜蝇H.floralis Fallen,群众称为油菜根蛆。它不仅是十字花科蔬菜的主要害虫,而且是冬油菜苗期的主要害虫。 In view of the serious death of winter rapeseed in our district, the area of ​​tillage plowing area is large and the yield is low and unstable, a survey was conducted on a large area of ​​rapeseed plots, further confirming that the main reason for the death of rapeseed is the damage of canola root maggots . The root canola is the larva of the root canola. Canola root flies, also known as cabbage flies H.floralis Fallen, the masses called rape root maggots. It is not only the major pest of cruciferous vegetables, but also the major pest of the winter rapeseed.